LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

my 383 setup

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Old Feb 4, 2006 | 10:16 AM
  #1  
Purplemaroz28's Avatar
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my 383 setup

well guys i had my le1 cam and le2 heads combo running for a week but do to hydro lock and a bent rod it was stopping it from running well and well its been about 4 months now, and right now im having the machine shop build me a 383 but it just seems to run into problem after problem. (the Crank was getting heavey metal added to it, but then the person doing this backed out and so now im having them get a new crank and neutral balance the flywheel, Does this all sound right?). This is getting really really really depressing it really is. So now im asking you guys for some estimations, if you wouldnt mind to bring my spirits up. The combo is -5cc srp pistons, eagle forged i beams, eagle cast crank 3.75 stroke, the block has been bored and clearenced. My other specs are le1 cam , le2 heads, 58mm tb, 30# injectors, shorty headers , moroso intake, ported intake, and of course 1.6rr. So with this combination which is estimated at 10.3:1 compression, what kinda of power do you think i am looking at having? Any guess is appreciated i need some reason to still care, this is realy a depressing matter. So give me some hope what the final outcome will be.

Last edited by Purplemaroz28; Feb 7, 2006 at 09:52 PM.
Old Feb 4, 2006 | 10:48 AM
  #2  
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Re: my 383 setup

First edit your post and take those cam specs out, leave it at LE1 or say mid 220s something like that..

Why are you LOWERING compression, stock your motor was 10.4 and if anything you should be looking to raise it.
Old Feb 4, 2006 | 10:59 AM
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Re: my 383 setup

Originally Posted by 96capricemgr
First edit your post and take those cam specs out, leave it at LE1 or say mid 220s something like that..
What are you, the LE Cam Police?
Old Feb 4, 2006 | 11:00 AM
  #4  
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Re: my 383 setup

Originally Posted by Purplemaroz28
le1 cam 22x/22x .5xx/.5xx
There is more to this cam than these numbers - don't get too worked up, guys.

As a gesture of respect to Lloyd, I've modified the quote. I still think the numbers themselves are just that - numbers. If you don't know what you're looking at or doing with regard to camshaft design, these numbers don't mean a thing.

Last edited by SS MPSTR; Feb 7, 2006 at 11:31 PM.
Old Feb 4, 2006 | 11:05 AM
  #5  
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Re: my 383 setup

I use to wonder about why people made a big deal about the cam numbers being a secret. A friend of mine explained it to me but I still find it hard to believe it can be kept a secret when youre selling alot of them. Anyways I hope everything works out with the car.
Old Feb 5, 2006 | 08:11 PM
  #6  
Purplemaroz28's Avatar
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Re: my 383 setup

Originally Posted by 96capricemgr
First edit your post and take those cam specs out, leave it at LE1 or say mid 220s something like that..

Why are you LOWERING compression, stock your motor was 10.4 and if anything you should be looking to raise it.
sorry if i offeneded anyone but i figure since i paid $250+ for something i have the right to say what it is, but if loyd would like me to edit the post then i will, thats up to him. its a 95 so it had a 10.5:1 compression but the reason im going lower is because i still have to pass smog, and well any other piston combination would make the compression either extremley low or higher than stock and when you raise compression u effect smog so i figure to try and get it to pass ill just have it be a little lower. But since no one answered my question ill ask again, what kind of numbers should i expect?
-Steven
By the way, Loyd if you would like me to take down the specs then i will.
Old Feb 5, 2006 | 10:27 PM
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Re: my 383 setup

I don't believe compression effects emissions, but someone correct me if I'm wrong. If your adding cubes you might want to up your cam size. But then again you seemed worried about emissions. With your current set-up (383) I would guess about 380 rwhp and 410 rwtq. And as SS MPSTR stated, theres alot more to the cam specs then what has been posted, easy guys.
Old Feb 7, 2006 | 10:55 AM
  #8  
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Re: my 383 setup

Originally Posted by Z-RATED94
I don't believe compression effects emissions, but someone correct me if I'm wrong. If your adding cubes you might want to up your cam size. But then again you seemed worried about emissions. With your current set-up (383) I would guess about 380 rwhp and 410 rwtq. And as SS MPSTR stated, theres alot more to the cam specs then what has been posted, easy guys.
I was thinking about going bigger but it has to pass smog and with everything ive done already im a little worried already. Maybe in the future ill go with a bigger cam setup., but honestly this is my first high hp car so i would like to find out what everyone means by 380 hp before i decide on more hp. because i have a feeling thats already gonna be a little more than i expect. Besides this is my daily driver and there are other things that have to be addressed, such as the totally stock suspension, rearend, exhaust (except headers), and since its my daily driver the stereo
Old Feb 7, 2006 | 12:34 PM
  #9  
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Re: my 383 setup

-5cc pistons on a 383 are going to net more than 10.3 compression. With an .049 compressed gasket and those pistons .020 in the hole, you would be above 11:1. Compression is a good thing!!! Ask Lloyd where to set your static compression ratio for that cam and he can tell you. If you set the static compression right for that cam, it will be more efficient and have better driving manners.
Old Feb 7, 2006 | 12:37 PM
  #10  
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Re: my 383 setup

I'd 'guess' 350-365rwhp with everything being spot on and emission compliant. Depending on how that cam is ground, it may have a hard time passing CA emissions. In order to keep it completely legal, there are going to be a fair number of performance sacrifices...none of which I was willing to concede in my 383 project.

It's an important choice, and you will always wonder 'what if..' because the power you're leaving on the table is significant for the sake of emission compliance. There are a lot of FI options available though...
Old Feb 7, 2006 | 09:07 PM
  #11  
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Re: my 383 setup

right move by getting the -5 cc piston. You should be well over 11 to 1 CR though and that is where you want to be. They are either estimating the CR with a 64 (?) cc head or they are using a -12 to -16 cc piston and figuring with the correct chamber volume (57 cc). Hopefully it IS the -5 cc piston and they just figured the chamber volume wrong. You are still fine for pump gas with this CR.

I would appreciate you removing the specs even though we have just stumled across a few changes ion our cams once again with promising results. The cam specs arenot current to what we are using but I would appreciate them to be deleted.

I am just amazed that Bret keeps tweaking the specs on these things and finding more power. Just ahd a guy email me about a 394 RWHP LE1 cam set up with this newest version of the LE1 cam and it is still in the low 220's on duratiuon. Just crazy.

ANYWAY . . . . . ,

Just focus on keeping that -5 cc piston and keeping the quench between .035-.042 and you will have a nice running car.

If you are running 1 5/8 shorty headers with small collectors and a restrictive exhaust system, I would guess about 370 RWHP and a REAL fat TQ curve with a "Hot Cam" type idle at 850 RPM.

If we could get around the emissions part and use some 1 3/4 LT headers with 3" collectors, no cats and a 3" TRUYE DUAL set up, we would be in the 385-390 RWHP range with the same cam.

If we could use one of my 383 LE2 cams with this type of exhaust, we could gain another 30 HP or so.

Lloyd Elliott
972-617-5671
Eportworks.com
Old Feb 7, 2006 | 09:56 PM
  #12  
Purplemaroz28's Avatar
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Re: my 383 setup

Originally Posted by NightTrain66
right move by getting the -5 cc piston. You should be well over 11 to 1 CR though and that is where you want to be. They are either estimating the CR with a 64 (?) cc head or they are using a -12 to -16 cc piston and figuring with the correct chamber volume (57 cc). Hopefully it IS the -5 cc piston and they just figured the chamber volume wrong. You are still fine for pump gas with this CR.

I would appreciate you removing the specs even though we have just stumled across a few changes ion our cams once again with promising results. The cam specs arenot current to what we are using but I would appreciate them to be deleted.

I am just amazed that Bret keeps tweaking the specs on these things and finding more power. Just ahd a guy email me about a 394 RWHP LE1 cam set up with this newest version of the LE1 cam and it is still in the low 220's on duratiuon. Just crazy.

ANYWAY . . . . . ,

Just focus on keeping that -5 cc piston and keeping the quench between .035-.042 and you will have a nice running car.

If you are running 1 5/8 shorty headers with small collectors and a restrictive exhaust system, I would guess about 370 RWHP and a REAL fat TQ curve with a "Hot Cam" type idle at 850 RPM.

If we could get around the emissions part and use some 1 3/4 LT headers with 3" collectors, no cats and a 3" TRUYE DUAL set up, we would be in the 385-390 RWHP range with the same cam.

If we could use one of my 383 LE2 cams with this type of exhaust, we could gain another 30 HP or so.

Lloyd Elliott
972-617-5671
Eportworks.com
maybe after i have it running for a bit and find out the potential it has now then ill step it up to a bigger cam and try the le2 383 but that wont be till after i tweak other things a tad. Sorry about posting the specs as u can see i removed them, someone quoted me though so................. I just want to get it running right and thne start looking at getting more ponies under its belt
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